Hey Virat,

All the seats given to EWS Category will be only alloted to the candidate of EWS Category. For instance if you belong to OBC or SC/ST Category then of you have scored enough as unreserved then your seat will be alloted through unreserved or in your category. 

No matter it category seats remain vacant. Seats are only reserved for that particular category.

Best of luck

Hi Aspirant

Your question is incomplete as you have not mentioned some of the details so I cannot seem to understand what information you are exactly trying to look for.

You have not mentioned any particular competitive examination or counseling process. Without knowing the particular details answering this question is impossible.

Mention these details in the comments section below and I will try to help you out.